<template>
	<div>
		<el-breadcrumb separator-class="el-icon-arrow-right">
		   <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		   <el-breadcrumb-item>商品管理</el-breadcrumb-item>
		   <el-breadcrumb-item>参数列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图 -->
		<el-card>
			<el-alert show-icon :closable="false" title="注意:只允许为第三级分类设置相关参数!" type="warning"></el-alert>
			<!--  选择商品分类区域  -->
			<el-row class="cat_opt">
					<el-col>
						<span> 选择商品分类：</span>
						<!-- 级联选择框 -->
						<el-cascader
							expand-trigger="hover"
						   v-model="selectedCateKeys"
						   :options="catelist"
						   :props="cateProps"
						   @change="handleChange()"></el-cascader>
					</el-col>
			</el-row>
			<!-- tab页签区域 -->
			<el-tabs v-model="activeName" @tab-click="handleTabClick">
				<!-- 添加动态参数面板 -->
			    <el-tab-pane label="动态参数" name="many">
					<el-button @click="addDialogVisible=true" :disabled="isBtnDisabled" size="mini" type="primary">添加参数</el-button>

					<!-- 动态参数表格 -->
					<el-table :data="manyTableData" border stripe>

						<!-- 展开航 -->
						<el-table-column type="expand">
							<template slot-scope='scope'>
								<el-tag @close="handleClose(i,scope.row)" closable v-for="(item,i) in scope.row.attr_vals" :key='i'>{{item}}</el-tag>

								<!-- 输入文本 -->
								<el-input
								  class="input-new-tag"
								  v-if="scope.row.inputVisible"
								  v-model="scope.row.inputValue"
								  ref="saveTagInput"
								  size="small"
								  @keyup.enter.native="handleInputConfirm(scope.row)"
								  @blur="handleInputConfirm(scope.row)"
								>
								</el-input>
								<!-- 添加按钮 -->
								<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

							</template>

						</el-table-column>

						<el-table-column type="index"></el-table-column>
						<el-table-column label="参数名称" prop="attr_name"></el-table-column>
						<el-table-column label="操作" >
							<template slot-scope='scope'>
								<el-button  @click="showEditDialog(scope.row.attr_id)" size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
								<el-button @click="removeParms(scope.row.attr_id)" size="mini" type="danger" icon="el-icon-delete">删除</el-button>
							</template>
						</el-table-column>
					</el-table>

				</el-tab-pane>
			    <el-tab-pane label="静态属性" name="only">
					<el-button  @click="addDialogVisible=true" :disabled="isBtnDisabled" size="mini" type="primary">添加属性</el-button>

					<el-table :data="onlyTableData" border stripe>

						<el-table-column type="expand">
							<template slot-scope='scope'>
								<el-tag @close="handleClose(i,scope.row)" closable v-for="(item,i) in scope.row.attr_vals" :key='i'>{{item}}</el-tag>

								<!-- 输入文本 -->
								<el-input
								  class="input-new-tag"
								  v-if="scope.row.inputVisible"
								  v-model="scope.row.inputValue"
								  ref="saveTagInput"
								  size="small"
								  @keyup.enter.native="handleInputConfirm(scope.row)"
								  @blur="handleInputConfirm(scope.row)"
								>
								</el-input>
								<!-- 添加按钮 -->
								<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

							</template>

						</el-table-column>

						<el-table-column type="index"></el-table-column>
						<el-table-column label="属性名称" prop="attr_name"></el-table-column>
						<el-table-column label="操作" >
							<template slot-scope='scope'>
								<el-button @click="showEditDialog(scope.row.attr_id)" size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
								<el-button @click="removeParms(scope.row.attr_id)" size="mini" type="danger" icon="el-icon-delete">删除</el-button>
							</template>
						</el-table-column>
					</el-table>

				</el-tab-pane>
			  </el-tabs>

		</el-card>

		<!-- 添加参数 -->
		<el-dialog
		  :title="'添加'+titleText"
		  :visible.sync="addDialogVisible"
		  width="50%"
		  @close="addDialogClosed">
		  <el-form
		  :rules="addFormRules"
		  ref="addFormRef"
		  :model="addForm"
		  label-width="80px">
				<el-form-item :label="titleText" prop="attr_name">
				  <el-input v-model="addForm.attr_name"></el-input>
				</el-form-item>
			</el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="addDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="addParams">确 定</el-button>
		  </span>
		</el-dialog>

		<!-- 修改参数 -->
		<el-dialog
		  :title="'修改'+titleText"
		  :visible.sync="editDialogVisible"
		  width="50%"
		  @close="editDialogClosed">
		  <el-form
		  :rules="editFormRules"
		  ref="editFormRef"
		  :model="editForm"
		  label-width="80px">
				<el-form-item :label="titleText" prop="attr_name">
				  <el-input v-model="editForm.attr_name"></el-input>
				</el-form-item>
			</el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="editDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="editParams">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
export default {
  data () {
    return {
      editForm: {
        attr_name: ''
      },
      editDialogVisible: false,
      catelist: [],
      //
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedCateKeys: [],
      activeName: 'many',
      // 动态参数
      manyTableData: [],
      // 静态参数刷
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      // 表单规则验证对象
      addFormRules: {
        attr_name: [{
          required: true,
          message: '请输入参数',
          trigger: 'blur'
        }]
      },
      editFormRules: {
        attr_name: [{
          required: true,
          message: '请输入参数',
          trigger: 'blur'
        }]
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        this.$message.error('获取商品分类失败')
      }
      this.catelist = res.data
    },
    async handleChange () {
      this.getParamsData()
    },
    handleTabClick () {
      this.getParamsData()
    },
    async getParamsData () {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }

      // 根据所选的id合面板获取对应的参数
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败')
      }
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [],
        // 控制文本框的显示与隐藏
        item.inputValue = ''
        item.inputVisible = false
      })
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, { attr_name: this.addForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败！')
        }
        this.$message.success('添加参数成功')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改参数
    editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 200) {
          return this.$message.error('修改失败')
        }
        this.$message.success('修改成功')
        this.editDialogVisible = false
        this.getParamsData()
      })
    },
    // 监听修改弹框
    async showEditDialog (attr_id) {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`, { params: { attr_sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 删除参数
    async removeParms (attr_id) {
				 const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      }
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除失败')
      }
      this.$message.success('删除成功')
      this.getParamsData()
    },
    // 文本框失去焦点或按下enter键触发时间
    async handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      console.log(row)
      row.attr_vals.push(row.inputValue)

      this.saveAttrVals(row)

      row.inputValue = ''
    },
    // 点击按钮展示文本输入框
    showInput (scope) {
      scope.inputVisible = true
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 删除参数项
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    },
    async saveAttrVals (row) {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
        { attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ') }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败')
      }
      this.$message.success('修改参数项成功')
    }
  },
  computed: {
    isBtnDisabled () {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId () {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style scoped>
	.cat_opt{
		margin: 15px 0;
	}
	.el-cascader{
		width: 20%;
	}
	.el-tag{
		margin:0 10px ;
	}
	.input-new-tag{
		width: 120px;
	}
</style>
